Re: (PM) Package A or package B (Pac Bell) (fwd)

MegaZone (megazone@megazone.org)
Thu, 28 May 1998 16:52:04 -0700 (PDT)

Once upon a time Jake Messinger shaped the electrons to say...
>Kewl,so does it then "convert" temporarily one of the B channels to a
>signal D channel?

No. There is always 23B+D on each. HOWEVER, instead of being independent
you have:
23B+Primary-D
23B+Backup-D

All of the signalling is normally carried on the Primary, but the Backup
will take over if it is lost. So what, 2 lines, same number of ports.

Well, NFAS can run up to 20 PRIs (possibly more - I've heard it is different
with Nortel switches). And if you have that many, you certainly want the
reliability of a backup D channel.

-MZ

-- 
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